试验室配制出的快硬耐寒砂浆和混凝土,由于配方和施工方法不同,具有两种特性和用途.一是快硬,二小时后可达150～200公斤/厘米~2,适合于需要早期强度的快速施工和抢修工程;二是耐寒,当工程不需要早强时,用于低温下养护能达设计标号.以上二者在-45℃气温下,均可达200号,恢复正温养护后,可达400号以上. The quick-hardening cold mortar and concrete prepared in the laboratory have two characteristics and uses due to different formulas and construction methods. The first is fast-hardening and can reach 150-200 kg/cm~2 after two hours, which is suitable for the need of early strength. The rapid construction and repair work; the second is cold, when the project does not require early strength, for the maintenance of low temperature can reach the design label. The above two at -45 °C temperature, up to 200, after the restoration of positive temperature maintenance , up to 400 or more.